java 反射错误

Question

[color=red]实体类：[/color]
public class Hotel {

private long id;

public long getId() {
    return id;
}

public void setId(long id) {
    this.id = id;
}

}

[color=red]测试方法：[/color]
public void testReflect() throws Exception{
Object object = Hotel.class.newInstance();
String setMethod = "setId";
Method method = object.getClass().getDeclaredMethod(setMethod, new Class[]{Object.class});
method.invoke(object, new Object[]{1L});
}

[color=red]出错信息：[/color]
java.lang.NoSuchMethodException: setId
at java.lang.ClassCache.findMethodByName(ClassCache.java:247)
at java.lang.Class.getDeclaredMethod(Class.java:731)
at java.lang.reflect.Method.invokeNative(Native Method)

Answer 1

Method method = object.getClass().getDeclaredMethod(setMethod, new Class[]{[color=red]long.class[/color]});